题目内容
解方程.
x-
=
3x=7×
x÷
=
x÷
+
=1.
x-
| 4 |
| 9 |
| 5 |
| 6 |
3x=7×
| 18 |
| 7 |
x÷
| 8 |
| 15 |
| 5 |
| 6 |
x÷
| 4 |
| 5 |
| 3 |
| 4 |
考点:方程的解和解方程
专题:简易方程
分析:x-
=
,方程两边同时加
,即可求出方程的解;
3x=7×
,首先将方程化简为:3x=18,两边同时除以3,即可求出方程的解;
x÷
=
,两边同时乘
,即可求出方程的解;
x÷
+
=1.首先把x÷
看作一个整体,方程两边同时减
,再方程两边同时乘
,即可求出方程的解.
| 4 |
| 9 |
| 5 |
| 6 |
| 4 |
| 9 |
3x=7×
| 18 |
| 7 |
x÷
| 8 |
| 15 |
| 5 |
| 6 |
| 15 |
| 8 |
x÷
| 4 |
| 5 |
| 3 |
| 4 |
| 4 |
| 5 |
| 3 |
| 4 |
| 4 |
| 5 |
解答:
解:x-
=
x-
+
=
+
x=
;
3x=7×
3x=18
3x÷3=18÷3
x=6;
x÷
=
x÷
×
=
×
x=
;
x÷
+
=1
x÷
+
-
=1-
x÷
=
x÷
×
=
×
x=
.
| 4 |
| 9 |
| 5 |
| 6 |
x-
| 4 |
| 9 |
| 4 |
| 9 |
| 5 |
| 6 |
| 4 |
| 9 |
x=
| 23 |
| 18 |
3x=7×
| 18 |
| 7 |
3x=18
3x÷3=18÷3
x=6;
x÷
| 8 |
| 15 |
| 5 |
| 6 |
x÷
| 8 |
| 15 |
| 8 |
| 15 |
| 5 |
| 6 |
| 8 |
| 15 |
x=
| 4 |
| 9 |
x÷
| 4 |
| 5 |
| 3 |
| 4 |
x÷
| 4 |
| 5 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x÷
| 4 |
| 5 |
| 1 |
| 4 |
x÷
| 4 |
| 5 |
| 4 |
| 5 |
| 1 |
| 4 |
| 4 |
| 5 |
x=
| 1 |
| 5 |
点评:此题考查的目的是理解掌握利用等式的性质解方程的方法步骤.
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